57105531 has 18 divisors (see below), whose sum is σ = 95953572. Its totient is φ = 32631480.

The previous prime is 57105523. The next prime is 57105547. The reversal of 57105531 is 13550175.

It is not a de Polignac number, because 57105531 - 2³ = 57105523 is a prime.

It is a super-2 number, since 2×57105531² = 6522083341583922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 57105495 and 57105504.

It is not an unprimeable number, because it can be changed into a prime (57105511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 64305 + ... + 65186.

It is an arithmetic number, because the mean of its divisors is an integer number (5330754).

Almost surely, 2^57105531 is an apocalyptic number.

57105531 is a deficient number, since it is larger than the sum of its proper divisors (38848041).

57105531 is a wasteful number, since it uses less digits than its factorization.

57105531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129511 (or 129501 counting only the distinct ones).

The product of its (nonzero) digits is 2625, while the sum is 27.

The square root of 57105531 is about 7556.8201645930. The cubic root of 57105531 is about 385.0874732372.

The spelling of 57105531 in words is "fifty-seven million, one hundred five thousand, five hundred thirty-one".